CN103335744B - Double-range hyperchannel nuclear heat source power measuring system - Google Patents
Double-range hyperchannel nuclear heat source power measuring system Download PDFInfo
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- CN103335744B CN103335744B CN201310109826.7A CN201310109826A CN103335744B CN 103335744 B CN103335744 B CN 103335744B CN 201310109826 A CN201310109826 A CN 201310109826A CN 103335744 B CN103335744 B CN 103335744B
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- temperature
- heat source
- electromotive force
- fine copper
- source power
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Abstract
The present invention relates to a double-range hyperchannel nuclear heat source power measuring system, comprise sensor, signal gathering unit, signal fused processing unit, power display unit, two cooling system.Sensor is symmetrical structure, exportable 4 temperature signals and 4 electric potential signals; Signal gathering unit can collecting temperature and electric potential signal, is sent to signal fused processing unit; Based on the temperature difference and electromotive force two kinds of measuring principles, the temperature difference and electromotive force respectively have 4 power-level channels, respectively through use processing, obtain the nuclear heat source power measurement values of the temperature difference and electromotive force two passage, export power display unit to; The radiation heat that sensor absorbs taken away by cooling system.Hyperchannel nuclear heat source power measuring system through signal fused can evade nuclear heat source putting position and the unequal adverse effect of self heat flux distribution, and hyperchannel result can verify mutually simultaneously, improves system reliability; This nuclear heat source power measuring system possesses double-range, can realize the measurement of two grade thermal powers.
Description
Technical field
The present invention relates to a kind of double-range hyperchannel nuclear heat source power measuring system, this system is applicable to the measurement of nuclear heat source thermal power, is also applicable to thermal power and the heat flow measurement of column thermal source.
Background technology
The heat supply of spacecraft and power supply technique are the keys realizing space flight survey of deep space, so far, in spacecraft, be successfully applied to the power technology of heat supply of satellite borne equipment have chemical cell (being mainly used in power supply), fuel cell, solar cell, isotope heat source (for heat supply) or isotope thermoelectric cell (for power supply).The serviceable life of chemical cell, fuel cell generally only has the several months, is mainly used in short time duty.The serviceable life of solar cell is 1-5, is mainly used in the detection of sun-drenched terrestrial space.These three kinds of energy are unfavorable for the long-term detection in the deep layer space of sunlight deficiency.Isotope heat source or isotope thermoelectric cell utilize isotope that decay occurs and produce heat, do not rely on sunlight and irradiate, and its specific energy is about 10
4~ 10
5wh/kg, is far longer than chemical cell and fuel cell, simultaneously serviceable life longer (10 years, even longer), the desirable energy of power electronic equipment heat supply on the spacecraft becoming interspace detection.
Isotopes thermal source is different from general thermal source, mainly contains following characteristics: (1) has nuclear radiation; (2) shape is column; (3) nuclear heat source surface is subject to contaminating impurity; (4) short time (within 24 hours) changed power is very little.
The thermal power measurement of Isotopes thermal source is that to realize nuclear heat source be that spacecraft is powered the basic premise of heat supply.It is generally by measuring heat flow density that current thermal source thermal power is measured, and then being converted by heat flow density obtains thermal power numerical value, as common film-type heat flow meter, flat heat flow meter; These heat flow meters are difficult to the feature meeting core isotope heat source when measuring; Meanwhile, existing thermal source thermal power is measured and is usually adopted single-measurement principle, single-measurement passage, single-measurement range, and the measurement result distortion that the system failure causes or mistake appear in measuring system in measuring process, cannot distinguish in time; When the power grade larger change of generation (several times or decades of times) of tested thermal source changes, single-measurement range cannot meet measurement demand fast.
Summary of the invention
One object of the present invention overcomes the deficiencies in the prior art, provides the double-range hyperchannel nuclear heat source power measuring system of a kind of pair of measuring principle, hyperchannel multi-path redundancy signal fused, high precision, high-reliability.
According to an aspect of the present invention, provide a kind of double-range hyperchannel nuclear heat source power measuring system, it is characterized in that:
Sensor,
JI130013
First and second cooling systems,
Signal gathering unit,
Signal fused processing unit.
The present invention's advantage compared with prior art comprises:
1) two principle is measured: based on the nuclear heat source power measuring system of the temperature difference and two kinds of nuclear heat source power measurement principles based on electromotive force;
2) double-range: this nuclear heat source power measuring system possesses double-range, the thermal power that can realize different brackets nuclear heat source is measured;
3) multi-channel information synchronization: have four nuclear heat source power-level channels based on the temperature difference, four nuclear heat source power-level channels are had based on electromotive force, hyperchannel, through signal fused, has evaded the adverse effect can evading nuclear heat source putting position and the unequal nuclear heat source power measurement of self heat flux distribution;
4) multi-channel measurement: measurement result verifies mutually, improves the confidence level of nuclear heat source power measuring system measurement result, improves the reliability of system simultaneously.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of double-range hyperchannel nuclear heat source power measuring system according to an embodiment of the invention.
Fig. 2 is the workflow of double-range hyperchannel nuclear heat source power measuring system according to an embodiment of the invention.
Drawing reference numeral explanation
101 sensor 102 case lid 103 casings
104 heat-barrier material 105 sensitive element 106 fine copper heat interchanger A
107 fine copper heat interchanger B201 signal gathering unit 202 temperature sensors
203 temperature sensor 204 temperature sensors
205 temperature sensor 206 electric potential signal measurement terminal
207 electric potential signal measurement terminal 208 electric potential signal measurement terminal
209 electric potential signal measurement terminal 210 temperature transmitting modules
211 electromotive force filter and amplification module 212 electromotive force filter and amplification modules
213 electromotive force filter and amplification module 214 electromotive force filter and amplification modules
215 electromotive force transmitting module 301 signal fused processing units
401 power display unit 402 numeral method unit 403 touch screens
404 state indication unit 501 cooling system 1502 cooling systems 2
Embodiment
Below in conjunction with specific embodiment, the present invention is further described.Should be understood that this explanation is only the description of this invention, instead of limitation of the invention.
Double-range hyperchannel nuclear heat source power measuring system according to an embodiment of the invention comprises sensor 101, first and second cooling system 501 and 502 as shown in Figure 1A, and the signal gathering unit 201 shown in Figure 1B, signal fused processing unit 301, power display unit 401.
As shown in Figure 1A, sensor 101 comprises case lid 102, casing 103, heat-barrier material 104, sensitive element 105, first fine copper heat interchanger 106, second fine copper heat interchanger 107.Heat-barrier material 104 is enclosed in around sensitive element 105 and first, second fine copper heat interchanger 106107; Heat-barrier material 104, sensitive element 105, first fine copper heat interchanger 106, second fine copper heat interchanger 107 are placed on box house.Case lid 102 internal placement heat-barrier material 104, can reduce after casing and case lid close and leak heat.
First, second fine copper heat interchanger 106, between 107 with sensitive element for welding.Be arranged symmetrically with before and after the circumferential center that the probe of temperature sensor 202 and 204 is close to sensitive element 105.The Probe arrangement of temperature sensor 203 and 205 is on the surface of the first fine copper heat interchanger 106 and the second fine copper heat interchanger 107.First water-cooling system 501 and the second water-cooling system 502 adopt pipeline to be connected with the first fine copper heat interchanger 106 of casing 103 inside of sensor 101 and the second fine copper heat interchanger 107 respectively.
As shown in Figure 1B, the signal gathering unit 201 of double-range hyperchannel nuclear heat source power measuring system according to an embodiment of the invention comprises four temperature sensors 202,203,204 and 205(as platinum resistance P1000), electric potential signal measurement terminal 206,207,208 and 209, temperature transmitting module 210, four electromotive force filter and amplification modules 211,212,213 and 214, electromotive force transmitting modules 215.Temperature transmitting module 210 is connected with four temperature sensors 202,203,204,205, carries out temperature acquisition, and the temperature signal (T that will collect
max1, T
max2, T
min1, T
min2) process change deliver to signal fused processing unit 301.
Each electric potential signal measurement terminal 206,207,208 and 209 comprises two wires for potential measurement.Each electric potential signal measurement terminal can export an electromotive force.The material of described wire is identical, such as, be all silver-plated copper wire.
When there is the temperature difference when between sensitive element 105 as shown in Figure 1 and first, second fine copper heat interchanger 106,107, between sensitive element 105 and the first fine copper heat interchanger 106, produce thermoelectrical potential, and produce thermoelectrical potential between sensitive element 105 and the second fine copper heat interchanger 107; First electric potential signal measurement terminal 206 measures electromotive force e between sensitive element 105 front end high temperature and the first fine copper heat interchanger 106 low temperature
1, the second electric potential signal measurement terminal 207 measures electromotive force e between sensitive element 105 rear end high temperature and the first fine copper heat interchanger 106 low temperature
2, the 3rd electric potential signal measurement terminal 208 measures electromotive force e between sensitive element 105 front end high temperature and the second fine copper heat interchanger 107 low temperature
3, the 4th electric potential signal measurement terminal 209 measures electromotive force e between sensitive element 105 rear end high temperature and the second fine copper heat interchanger 107 low temperature
4, these thermoelectrical potentials input to four electromotive force filter and amplification modules 211,212,213,214 through electric potential signal measurement terminal 206,207,208,209 and amplify, and after through electromotive force transmitting module 215 become deliver to signal fused processing unit 301.In this embodiment, the temperature difference and electromotive force respectively have 4 power-level channels, based on the temperature difference and electromotive force two kinds of measuring principles, respectively through use processing, obtain the nuclear heat source power measurement values of the temperature difference and electromotive force two passages, these measured values are output to power display unit 401.
Power display unit 401 according to an embodiment of the invention comprises numeral method unit 402, touch screen display unit 403, state indication unit 404; State indication unit 404 is for realizing normal, fault, fault alarm function.
Fig. 2 shows an embodiment of the workflow of the double-range hyperchannel nuclear heat source power measuring system of an embodiment as shown in Figure 1.In this flow embodiment, after system cloud gray model starts, measuring system powers on, after the schedule time (as 4-5 second), place thermal source, then select thermal power Measurement channel, then carry out temperature acquisition by four temperature sensors 202,203,204,205 and temperature transmitting module 210, first to fourth electric potential signal measurement terminal 206,207,208,209 and electromotive force transmitting module 215 is adopted to carry out electromotive force collection, the temperature (T then will collected
max1, T
max2, T
min1, T
min2) and electric potential signal (e
1, e
2, e
3, e
4) process at signal fused unit 301, and judge whether temperature exceedes temperature limit, if temperature exceedes temperature limit (such as, in a specific embodiment, two maximum temperature limit values that temperature sensor 202,204 is surveyed are set as 120 DEG C, two minimum temperature limit values that temperature sensor 203,205 is surveyed are set as 40 DEG C), then show fault by state indication unit 404, its pilot lamp and hummer carry out warning instruction.If temperature does not exceed limit value, then judge whether two minimum temperatures that temperature sensor 203,205 is surveyed equal set-point.Meanwhile, state indication unit 404 shows normally; When being not equal to given numerical value, the regulating control command of loop cooling system is then sent by signal fused unit 301 calculating and sending, loop cooling system 501,502 is controlled, and reads further, judge temperature and electric potential signal, until minimum temperature is equal with given numerical value.
Then, judge whether system reaches stable; Such as, criterion is that the rate of temperature change such as measured by temperature sensor 202,204 is less than 0.2 DEG C/h, and the rate of temperature change that temperature sensor 203,205 records is less than 0.5 DEG C/h, and as met, then decision-making system reaches stable, otherwise decision-making system is unstable.If decision-making system is unstable, proceed the collection of temperature and electric potential signal, control.If system reaches stable, then the temperature read and electric potential signal are carried out filtering, and carry out data fusion in signal fused unit 301 inside, calculate nuclear heat source power, specifying information fusion process is described below:
Signal fused processing unit 301 is to four tunnel temperature T of the steady state (SS) of input
max1, T
max2, T
min1, T
min2, and four road electric potential signal e
1, e
2, e
3, e
4merge;
The nuclear heat source power recording four passages based on temperature difference principle is
Q
1=K
t1（t
max1-t
min1）
Q
2=K
t2（t
max1-t
min2）
Q
3=K
t3（t
max2-t
min1）
Q
4=K
t4（t
max2-t
min2）
K in formula
t1, K
t2, K
t3, K
t4for the coefficient of temperature difference passage;
The nuclear heat source power recording four passages based on electromotive force principle is
Q
1=K
e1e
1
Q
2=K
e2e
2
Q
3=K
e3e
3
Q
4=K
e4e
4
K in formula
e1, K
e2, K
e3, K
e4for the coefficient of electromotive force passage.
Finally, signal fused is carried out respectively:
The power of heat source fusion results Q of temperature difference passage
tfor
K in formula
tfor the coefficient of temperature difference passage.
The power of heat source fusion results Q of electromotive force passage
efor
Q
e=K
e(e
1+e
2+e
3+e
4)
In formula, K
efor the fusion coefficients of electromotive force passage.
Subsequently, thermal power numerical value Q fusion calculation gone out
t, Q
eoutput to power display unit 401, and refresh thermal power and the temperature information of touch screen display unit 403 and numeral method unit 402, then judge whether system has exit instruction, if having, end data collection, if without proceeding the collection of data, calculating, display.
The content be not described in detail in the present invention belongs to the known prior art of professional and technical personnel in the field.
Should be understood that, below the description carried out the present invention in conjunction with the accompanying drawings and embodiments just illustrates but not determinate, and do not depart from as appended claims under the prerequisite of the present invention that limits, can various change, distortion be carried out to above-described embodiment and/or revise.
Claims (7)
1. double-range hyperchannel nuclear heat source power measuring system, is characterized in that:
Sensor (101),
First and second water-cooling systems (501,502),
Signal gathering unit (201),
Signal fused processing unit (301),
Wherein
Sensor (101) comprises case lid (102), casing (103), heat-barrier material (104), sensitive element (105), the first fine copper heat interchanger (106), the second fine copper heat interchanger (107)
Heat-barrier material (104) is enclosed in around sensitive element (105) and first, second fine copper heat interchanger (106,107);
Heat-barrier material (104), sensitive element (105), the first fine copper heat interchanger (106), the second fine copper heat interchanger (107) are arranged on box house;
Case lid (102) internal placement heat-barrier material (104),
For being welded to connect between first, second fine copper heat interchanger (106,107) and sensitive element (105),
Described double-range hyperchannel nuclear heat source power measuring system comprises further:
First and three-temperature sensor (202,204), be arranged symmetrically with before and after the circumferential center that their probe is close to sensitive element (105) respectively,
Second and the 4th temperature sensor (203,205), their probe is arranged in the surface of the first fine copper heat interchanger (106) and the second fine copper heat interchanger (107),
The first fine copper heat interchanger (106) that first water-cooling system (501) and the second water-cooling system (502) are inner with casing (103) respectively and the second fine copper heat interchanger (107) are connected by pipeline,
Signal gathering unit (201) comprises four temperature sensors (202,203,204,205), four electric potential signal measurement terminal (206,207,208,209), temperature transmitting module (210), four electromotive force filter and amplification modules (211,212,213,214), electromotive force transmitting module (215)
Wherein
Temperature transmitting module (210) is connected with first to fourth temperature sensor (202,203,204,205), carries out temperature acquisition, and the temperature signal (T that will collect
max1, T
max2, T
min1, T
min2) process change deliver to signal fused processing unit (301),
Each electric potential signal measurement terminal (206,207,208,209) comprises two wires for potential measurement, and the material of described wire is identical.
2. double-range hyperchannel nuclear heat source power measuring system according to claim 1, is characterized in that:
When there is the temperature difference when between sensitive element (105) and first, second fine copper heat interchanger (106,107), produce thermoelectrical potential between sensitive element (105) and the first fine copper heat interchanger (106), and produce thermoelectrical potential between sensitive element (105) and the second fine copper heat interchanger (107);
First electric potential signal measurement terminal (206) is for measuring electromotive force e between sensitive element (105) front end high temperature and the first fine copper heat interchanger (106) low temperature
1,
Second electric potential signal measurement terminal (207) is for measuring electromotive force e between sensitive element (105) rear end high temperature and the first fine copper heat interchanger (106) low temperature
2,
3rd electric potential signal measurement terminal (208) is for measuring electromotive force e between sensitive element (105) front end high temperature and the second fine copper heat interchanger (107) low temperature
3,
4th electric potential signal measurement terminal (209) is for measuring electromotive force e between sensitive element (105) rear end high temperature and the second fine copper heat interchanger (107) low temperature
4.
3. double-range hyperchannel nuclear heat source power measuring system according to claim 2, is characterized in that:
Described electromotive force inputs to four electromotive force filter and amplification modules (211,212,213,214) through electric potential signal measurement terminal (206,207,208,209) and amplifies, and after through electromotive force transmitting module (215) become deliver to signal fused processing unit (301)
Wherein
The temperature difference and electromotive force respectively have 4 power-level channels, based on the temperature difference and electromotive force two kinds of measuring principles, respectively through use processing, obtain the nuclear heat source power measurement values of the temperature difference and electromotive force two passages, these measured values are output to a power display unit (401).
4. double-range hyperchannel nuclear heat source power measuring system according to claim 3, is characterized in that comprising further:
Described power display unit (401),
Described power display unit (401) comprises numeral method unit (402), touch screen display unit (403), state indication unit (404).
5. double-range hyperchannel nuclear heat source power measuring system according to claim 4, is characterized in that comprising further:
After described double-range hyperchannel nuclear heat source power measuring system runs and starts, described double-range hyperchannel nuclear heat source power measuring system powers on, and after thermal source is desirably placed, selects thermal power Measurement channel, then until a schedule time
Temperature acquisition is carried out by described first to fourth temperature sensor (202,203,204,205) and temperature transmitting module (210),
First to fourth electric potential signal measurement terminal (206,207,208,209) and electromotive force transmitting module (215) is adopted to carry out electromotive force collection, then
By the temperature (T collected
max1, T
max2, T
min1, T
min2) and electric potential signal (e
1, e
2, e
3, e
4) process at signal fused processing unit (301), and judge whether temperature exceedes temperature limiting,
If temperature exceedes temperature limit, then show fault by state indication unit (404), comprise and carry out warning instruction by its pilot lamp and hummer,
If temperature does not exceed temperature limit, then judge second and the 4th two minimum temperatures surveying of temperature sensor (203,205) whether equal set-point, meanwhile, state indication unit (404) display is normal; When described two minimum temperatures are not equal to given numerical value, the regulating control command of loop cooling system is sent by signal fused processing unit (301) calculating and sending, first water-cooling system (501) and the second water-cooling system (502) are controlled, and read further, judge temperature and electric potential signal, until minimum temperature is equal with given numerical value
Then, judge whether system reaches stable; If decision-making system is unstable, proceed the collection of temperature and electric potential signal, control; If system reaches stable, then the temperature read and electric potential signal are carried out filtering, and carry out data fusion in signal fused processing unit (301) inside, calculate nuclear heat source power.
6. double-range hyperchannel nuclear heat source power measuring system according to claim 5, is characterized in that
Described data fusion comprises:
By the four tunnel temperature Ts of signal fused processing unit (301) to the steady state (SS) of input
max1, T
max2, T
min1, T
min2with four road electric potential signal e
1, e
2, e
3, e
4merge;
The nuclear heat source power recording four passages based on temperature difference principle is
Q
1＝K
t1(T
max1-T
min1)
Q
2＝K
t2(T
max1-T
min2)
Q
3＝K
t3(T
max2-T
min1)
Q
4＝K
t4(T
max2-T
min2)
K in formula
t1, K
t2, K
t3, K
t4for the coefficient of temperature difference passage;
The nuclear heat source power recording four passages based on electromotive force principle is
Q
1＝K
e1e
1
Q
2＝K
e2e
2
Q
3＝K
e3e
3
Q
4＝K
e4e
4
K in formula
e1, K
e2, K
e3, K
e4for the coefficient of electromotive force passage,
Finally, signal fused is carried out respectively:
The power of heat source fusion results Q of temperature difference passage
tfor
K in formula
tfor the fusion coefficients of temperature difference passage,
The power of heat source fusion results Q of electromotive force passage
efor
Q
e＝K
e(e
1+e
2+e
3+e
4)
In formula, K
efor the fusion coefficients of electromotive force passage.
7. double-range hyperchannel nuclear heat source power measuring system according to claim 6, is characterized in that comprising further
The thermal power numerical value Q that fusion calculation is gone out
t, Q
eoutput to power display unit (401),
Refresh thermal power and the temperature information of touch screen display unit (403) and numeral method unit 402,
Judge whether system has exit instruction, if having, end data collection, if without proceeding the collection of data, calculating, display.
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|---|---|---|---|
| CN201310109826.7A CN103335744B (en) | 2013-03-29 | 2013-03-29 | Double-range hyperchannel nuclear heat source power measuring system |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5180440A (en) * | 1988-11-23 | 1993-01-19 | Pace Incorporated | Printed circuit thermocouple arrangements for personnel training and equipment evaluation purposes |
| CN101571428A (en) * | 2009-05-21 | 2009-11-04 | 中国科学院力学研究所 | Multi-function sensor and heat current and temperature measuring method under high temperature |
-
2013
- 2013-03-29 CN CN201310109826.7A patent/CN103335744B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5180440A (en) * | 1988-11-23 | 1993-01-19 | Pace Incorporated | Printed circuit thermocouple arrangements for personnel training and equipment evaluation purposes |
| CN101571428A (en) * | 2009-05-21 | 2009-11-04 | 中国科学院力学研究所 | Multi-function sensor and heat current and temperature measuring method under high temperature |
Non-Patent Citations (1)
| Title |
|---|
| 同位素热源量热方法研究;侯旭峰等;《电源设计》;20120930;第36卷(第9期);第1309-1312页 * |
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